【摘要】 以硝酸锌和改性明胶为原料采用溶胶-凝胶法制备纳米晶体氧化锌,透射电镜和X-射线衍射测试表明其平均粒径约20nm。用稀甲基橙水溶液分别在紫外灯和太阳光照射下测试研究其光催化活性能。试验结果表明,此反应为一级反应,表观速率常数与甲基橙初浓度、催化剂浓度及吸收光强度有关。更多还原

【Abstract】 Nanostructured crystalline ZnO was prepared with zinc nitrate and modified gelatin by the solgel method. Transmission electron microscope and X-ray diffraction measurements showed that its average particle size was about 20 nm. Its photocatalytic activity was studied in dilute methyl orange solution both under UV-lamp radiation and under sunlight, This photocatalytic reaction is first order. Apparent rate constant k is dependent on original concentration of methyl orange, the concentration of catalyst and absorbed intensity of radiation I_abs.更多还原